<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>滑动按钮</title>
    <link rel="stylesheet" href="index.css">
</head>
<body>
    <nav>
        <a href="#">home</a>
        <a href="#">category</a>
        <a href="#">about</a>
        <a href="#">message</a>
        <a href="#">article</a>
        <div class="animation"></div>
    </nav>
</body>
</html>